Process for the continuous manufacture of pellicles.



M. RATIGNIBR & H. PERVILHAG. rnoonss FOR THE oonmmons MANUFACTURE OFPELLIOLES. 7

APPLICATION TILED DEO.30,1908.

94:7,45'7. Patented Jan. 25, 1910.

\ //v VF/V 70 RS WITNESSES 2 UNITED sTATns PATENT OFFICE.

MARIUS RATIGNIER AND HENRY PERVILHAC, 0F LYONfFRANCE.

PROCESS FOR THE CONTINUOUS MANUFACTURE PELLICLES.

T 0 all whom it may concern:

Be it known that we. MARIUS RATIGNIER and I'IENRY PERVILHAC, citizens ofthe French Republic, and residing at Lyon, in France, have invented acertain new and useful Process for the Continuous Manufacture ofPellicles, of which the following is a specification.

In the process which forms the object of the present invention, thedifferent compounds, which serve at present for producing artificialsilk, are used for the continuous manufacture of pellicles. The processis particularly characterized by maintaining the pellicle in stretchedcondition during the course of its nmnufacture. The more or less regularwithdrawal of the compound is thus avoided, and a perfectly planepellicle is obtained, possessing a brilliance and transparency notproduced hitherto by known processes.

The accompanying drawing shows apparatus suitable for carrying out theprocess.

Figure 1 is a diagram representing the entire apparatus. Fig. 2 is asection on the line AA of Fig. 1.

The molding of the pellicle is effected on a cylinder a consisting of ahard substance and perfectly polished, said cylinder being adapted torotate'slowly in the direction of the arrow. For this purpose thecompound is contained in a liquid state in a reservoir 6, placed abovethe cylinder, and flows over the surface of the latter in a regularsheet, the thickness and width of which are limited by the movable wall(Z of the reservoir I) said wall leaving between itself and the cylinderan opening of regulatable dimensions. The pressure of flow is furtherregulated by maintaining a constant level in the reservoir 6.Immediately after its formation the pellicle 0 passes into a'strainer finclosing the whole lower part of the cylinder and in which circulates ahardening or solidifying liquid, the nature of which is appropriate tothe compound used. This liquid passes to the upper part of the strainerby means of a pipe g, and flows to the lower part thereof raising a flap0 of caoutchouc, which bears against the pellicle. The latter istherefore constantly soaked in the renewed liquid and passes out of thestrainer f in a perfectly solidified condition. The pellicle is detachedby a scraper 1', which also acts to clean the cylinder, this cleaningbeing completed by a Specification of Letters Patent.

Application filed December 30, 1908.

Patented Jan. 25, 1910.

Serial No. 469,941.

rotary brush 8, which is also adapted to deposit on the cylinder agreasy or other sub stance for preventing the adherence of the pellicleto the cylinder.

On leaving the cylinder a, the pellicle passes successively around thecylinders Int, 7' and it being accompanied during the whole course bytwo endless parallel cords a, 'n (Fig. which exert pressure against thecylinders. For this purpose, the cords a, 'n are guided by rollers Z, l6 A, Z l the separation or distance being maintained by grooves formedin said rollers, and their tension is obtained by the displacement ofone of the lower rollers Z 'lhe cords could however be replaced bybands, threads or ribbons of flexible and inextensible construction. Thepellicle 0 passes firstly over the roller Z, above-the cords a, thenbetween the cords and the cylinder /L, passes upward again over thesecond roller l after which it passes around the second cylinder 2', andso on up to the cylinder A}, where it issues in finished condition andis wound on the roller m. The first cylinder It serves for washing offthe solidifying substance remaining on the pellicle, its surface beingperforated or formed of plates to afford a clear passage to the water,which is fed freely to the interior and passes into a trough .0 whenceit escapes by a drain p. The pellicle, thus washed on its surfaces,passes to the cylinder 2', similarly constructed to the cylinder h, andwhere it is submitted to the action of acids or other reagents alreadyknown for producing films. The pellicle passes from here on the cylinderj, which is similar to cylinder /L,Wl1( 1'(3 it is submitted to a secondwashing with water and finally it passes onto the drying cylinder la,heated by known means at a regular temperature, whereupon it is wound onthe roller m.

If necessary the drying in a tensioned state may be continued on thislatter roller, by interposing a cloth (linen) between each convolutionof the pellicle during the winding.

What we claim as our invention and desire to secure by Letters Patent ofthe United States is 1. A process for the manufacture of pellicles,consisting in first forming a compound into a sheet and then treatingthe said sheet with acid and washing the same while stretching the sheettransversely.

2. A process for the continued lnanufacspecification in the presence oftwo Witture of peihcles, CODSlStlI'lg in forming a nesses.

compound into a sheet, treating said sheet MJXRIUS RATIGNIER.

with a solidifying agent, then stretching the HENRY PERVILHAC. 5 sametransversely andtreating it while so Witnesses:

stretched with acid and washing the sheet. GASTON JEANNMUX,

In witness whereof We have signed this Tnos. N. BROWN.

